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Finding the Fourth Proportional to 640.84, 960.91 and 332.38

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Solution

The fourth proportional to 640.84, 960.91 and 332.38 is: 498.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.84 : 960.91 = 332.38 : x
  2. Step 2: Convert to fraction form
    640.84/960.91 = 332.38/x
  3. Step 3: Cross multiply
    640.84x = 960.91 × 332.38
  4. Step 4: Simplify right side
    640.84x = 319,386.80
  5. Step 5: Solve for x
    x = 319,386.80/640.84
  6. Step 6: Final answer
    x = 498.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.